- #1
spaghetti3451
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I am taking the spectra of lithium, carbon and mercury on a piece of film with the help of a spectrograph. One of the parameters that affect the readings is the exposure times. (How?) I have to find the correct exposure times experimentally. (Why?) That is because the exposure times depend on the quality of the source. (So what?) For instance, if a lithium spectrum is taken using an electric arc as the source (the electric arc is produced by two lithium-doped carbon electrodes), then the exposure times depends on the alignment of the electrodes, the amount of lithium used and the stability of the arc. (So how does that influence the exposure time?).
So, I have to take several spectra using different exposure times to properly expose both the strong and weak features. (Don't get this point.)
Any help would be greatly appreciated.
So, I have to take several spectra using different exposure times to properly expose both the strong and weak features. (Don't get this point.)
Any help would be greatly appreciated.